Table 3

Comparisons of characteristics between subjects with bilateral and unilateral cataract surgery

	Unilateral cataract surgery with
	Bilateral cataract surgery (n=151)	Minimal cataract in fellow eye (n=43)	p Value^*	Significant cataract in fellow eye (n=87)	p Value^*
Age, years	69.7 (6.8)	65.3 (7.8)	<0.001	70.5 (6.7)	0.403
Gender, male	77 (51.0)	28 (65.1)	0.101	44 (50.6)	0.950
Age-related macular degeneration	13 (8.6)	5 (11.9)	0.516	10 (11.5)	0.468
Diabetic retinopathy	48 (31.8)	14 (33.3)	0.850	15 (17.4)	0.016
Glaucoma	14 (9.3)	3 (7.0)	0.639	10 (11.5)	0.583
Any cardiovascular disease	22 (14.6)	7 (16.3)	0.781	17 (19.5)	0.318
Current cigarette smoking	13 (8.6)	5 (11.6)	0.547	11 (12.6)	0.320
Low socioeconomic status	72 (47.7)	16 (37.2)	0.224	36 (41.4)	0.347
Mean Rasch score (95% CI)	3.38 (3.17 to 3.58)	3.39 (3.02 to 3.77)	0.941	2.99 (2.72 to 3.25)	0.021
Adjusted mean Rasch score (95% CI)^†	3.25 (2.99 to 3.50)	3.22 (2.78 to 3.66)	0.897	2.81 (2.46 to 3.16)	0.019

Data are presented as mean (SD) or number (%), as appropriate.
Cardiovascular disease is defined as a history of angina, myocardial infarction or stroke; low socioeconomic status is defined as having a primary or lower education and an individual monthly income less than $S2000.
↵* p Value to test for difference between bilateral cataract surgery (common) compared unilateral cataract surgery with a minimal cataract in fellow eye, significant cataract in fellow eye, presenting visual acuity worse than or equal to 6/12 and presenting visual acuity better than 6/12 in fellow eye, respectively, based on either a t test or χ² test, as appropriate.
↵† Adjusted for age, gender, cardiovascular disease, current cigarette smoking status, low socioeconomic status and the presence of eye diseases (including age-related macular degeneration, diabetic retinopathy and glaucoma).